Protecting cage for glass tubes



Aug. 8, 1950 KAHL 2,51 7,674

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Patented Aug. 8, 1950 UNITED STATES PATENT OFFICE 1 PROTECTING CAGE FORGLASS TUBES Joseph Kalil, New York, N. Y.

Application February 27, 1948, Serial No. 11,705

2 Claims.

My invention relates to improvements in a protecting cage for glasstubes, such as used for enclosing scales for thermometers, and itconsists in the novel features which are hereinafter described.

One of the objects of my invention is to simplify the construction ofthe cages thereby reducing the cost of labor.

Another object is to facilitate the assembling of the cages and toreduce the numbe of parts of the same.

A further object is to improve the appearance of the cages.

A still other object is to increase the strength of the cages and theirresistance to pressure in a direction from the outside towards theinside of the cages.

Another object is to provide circular seats for the tapered stems of thesaid glass tubes at the waistline of the cages.

Other objects and advantages will hereinafter appear.

I attain these objects by the protecting cage for glass tubes which isillustrated in the accompanying drawings or by an mechanical equivalentor obvious modification of the same.

In the drawings Fig. 1 is a fragmentary front elevation of my protectingcage for glass tubes, omitting the cover and hanger at the upper endthereof.

Figure 2 is a section in plan view on the line 2--2 of Fig. 1.

Figure 3 is a detail in plan view of a horse-shoe shaped fiat ribforming part of my improved cage which is hereinafter described.

Figure 4 is a detail in cross section on the line 44 of Fig. 2 of thehereinafter described waistline rib of my protecting cage; and Figure 5is a section in plan view of the line 5--5 of Fig. 1. Fig. 4 i drawn toa larger scale than the other figures on the drawing.

Similar numerals refer to similar parts throughout the several views.

H, Ha, and llb are vertically disposed cagerods which are secured toeach other and kept in position by horizontally disposed fiat ribs l2,I'Za, l3, l3a, and Hi; the ribs 12, 12a, l3 and Ba are annular in shape;the rib I4 is horse-shoe shaped as shown in Fig. 3.

The rods II are continuous from end to end of the cage and are bent at2| near their lower ends to a double curvature in a way to reduce thetransverse size of the lower end of the cage; one of the rods 1 l isomitted at the front of the cage to facilitate the reading of the scaleand is replaced by the short rods Ila and I ll) near the upper and thelower ends of the cage respectively.

The part of the rods H and H a at the upper end of the cage are kept inposition by two annular flat ribs I2; the rods ii at the intermediatepart of the cage are kept in position by the horseshoe shaped flat ribM; the parts of the rods H above and near the bends 2i are kept inposition by the flat rib I2a; the rods H at the waistline of the cagebelow and near the bends 2! are kept in position by the flat rib l3; andthe lower ends of the rods II are kept in positionby the fiat rib l3a.

The rod l lb is kept in position by the flat ribs IZa, l3 and I3a.

The ends of the rods 1 I, I la and 1 lb are riveted as at I5 over thefiat ribs [2, l2a, and li3a.

All of the fiat ribs may be shrunk on to the rods of the cage orotherwise secured thereto.

As shown in Figs. 2, 3, and 5, the rods pass through openings inintermediate parts of the fiat ribs leaving a margin or flange on eachof the fiat ribs inside as well as outside of the rods; the ribs therebyresist deflection of the rods by any force acting in a radial directionoutwardly as well as inwardly of the cage.

A fragment of a relatively large glass tube for holding therein athermometer scale and a relatively small thermometer tube is shown inbroken lines at 16 in Fig. 1.

The glass tube l6 terminates at the lower end thereof in a tapered stemH which is supported by the flat ring or rib i3 which is provided with acircular seat as at H3 in Fig. 4.

In cheaper outfits the seat it may be omitted and the stem I! supportedby the inner edge of the opening of the rib 13 which may be rounded offin cross-section if desired.

Variations are possible and parts of my invention may be used withoutother parts.

I claim as my invention and desire to secure by Letters Patent:

1. In a protecting cage for a glass tube, annular flat ribs andhorseshoe shaped fiat ribs, said ribs having therein openings arrangedin a center line passing through the intermediate parts thereof,continuous rods and fragmentary rods having their intermediate portionsomitted to allow a better view of said tube, said rods being arrangedaround a space for receiving said tube, the continuous rods passingthrough the openings in all of said ribs and being secured thereto, andthe fragmentary rods passin at their ends through the openings in theannular ribs and being secured thereto, the said horseshoe shaped ribsstantially vertical upper and lower ends passing through said openingsand being secured at their ends to the ribs which are adjacent to saidends, said rods being bent through a double curvature intermediate theirvertical parts to fit the shape of the tube and stem, and a circularsupport for said stem on said rods at the points of double curvaturethereof.

JOSEPH KAI-IL.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 284,774 Stevens et al Sept. 11,1883 924,276 Roesch June 8, 1909 1.119.627 Mueller et a1. Dec. 1, 1914

